You should probably go out and buy a box of tissues or two in preparation for next week's new episode of Glee, because if this new preview is any indication, you'll be crying a whole lot.

It's called "The Break-Up," and the title tells you everything you need to know. In this preview, Cory Monteith, finally back to the show, talk about how Rachel and Finn are going through "growing pains," each headed in different directions.

But the real star is Darren Criss. Blaine pays a surprise visit to NYC to see Kurt (because showing up in New York unannounced is all the rage this season). They head to a piano bar named Callbacks and Blaine performs a special song for his boyfriend. To bring things full circle, he does the very first song he ever sang, Katy Perry's "Teenage Dream." Only this time it's stripped down and very emotional.

Watching this, I just wanted to reach through the screen and give Blaine a big hug to let him know everything's gonna be OK. If Kurt doesn't change his ways and start paying more attention to Blaine after this, those two are doomed. How can anyone resist Blaine's cracked voice as he nearly tears up singing a love song?

If Kurt doesn't change his ways, he'll be sorry. Blaine is smart, sexy and incredibly sweet, and I'm sure he'll have thousands of gay guys clamoring for him if these two break up.